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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Phase Transformation Across Multiscale Material Interfaces
Presentation Title Grain Boundary Microstates under Irradiation: Which Came First?
Author(s) Mitra L Taheri, Osman El-Atwani, Asher Leff, Khalid Hattar, James Nathaniel, Blas Uberuaga
On-Site Speaker (Planned) Mitra L Taheri
Abstract Scope Understanding the sink efficiency of interfaces under irradiation is of paramount importance to tailoring materials for radiation tolerance. Using in situ irradiation coupled with precession electron diffraction analysis, defect absorption was tracked under increasing dose. Denuded zones were found to collapse in the absence of any detected changed in macroscopic degrees of freedom of the grain boundaries, and at different doses. Since a change in sink efficiency is likely due to a change in point defect mobility within the boundary. A change in microscopic character likely occurred, possibly due to the formation of extrinsic defects on the boundary. To analyze this further, simulations were used to explore grain boundary microstates loaded with defects and assessed for vacancy formation energies. Overall, the results present a foundation for improving sink efficiency descriptions under irradiation, and take a step forward in understanding complex interfacial dependencies.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Analysis of the Stability of Interfaces Fabricated Using Solid State Welds
Atom Probe Tomography Study of Interface Diffusion Assisted Self-healing Behaviour of Cr2Al(Si)C MAX Phase Coatings
Atomic-scale Characterization of Solute Segregation in Interfaces in Light Alloys
Effect of Lattice-level Covalent Character on Phase and Interfacial Stability in Mg-alloys
Efficient and Systematic Study of Phase Transformations Using Dual-anneal Diffusion Multiples
Exploiting Non-conventional Pathways for Transformations and Microstructural Evolution in Metastable Beta Ti Alloys
Grain Boundary Microstates under Irradiation: Which Came First?
Interdiffusion and Kinetics Study of Ti-Al Intermetallic by Brazing
Microstructural Characterization of Linear Friction Welded Interfaces in Ti-based Alloys
Modeling of Complexion Transitions at One- and Two-dimensional Defects
Modeling Transitions at Interfaces
Morphological Evolution and Mechanical Behavior of Co-sputtered Cu-Mo Thin Films
Nanoscale Interfacial Phase Structures in Roll-bonded Metallic Glass Composite Materials
Prevention of Coarsening Induced Phase Transformations in Al-Cu Alloys: Role of Interfaces
Roles of Transformation Interface for Controlling Microstructure and Properties of High Strength Steels
Structure and Mechanical Response of Highly Defective Grain Boundaries
Structure and Properties of BCC Mg Synthesized Using Interface Strain Engineering
The Effect of Diffusion on the Microstructure and Properties of a NiAl-based Anchor Phase Coating for CMSX-4
Transient-liquid-phase-bonding and Mechanical Properties of Ni-based-superalloy-H230 for Heat Exchangers in Supercritical CO2 Power Cycles

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